I ended up running at another track today, and was averaging about 8 1/2 -9 minutes, and was progressivly getting richer all day. By the end of my 6-7th tank, i had leaned out the top 4 hours, and bumped it up to 9 1/2 the next 3 tanks.
This was at the same track as last week, so I am pleased with the results thus far.